In less than a year, AT&T went from swallowing up T-Mobile USA for for $39 billion to owing T-Mobile’s German parent company $3 billion in cash and another billion in spectrum because that deal slammed into the regulatory roadblock at the FCC and the Justice Dept. Speaking for the third year in a row at the Consumer Electronics Show, FCC chair Julius Genachowski defended his agency’s actions against the deal. [More]